Fully bricked \ Black Screen \ nothing is working! what should I do?

ok here's my little story,

an update has been made on a Wii my friend gave me which I don't have the nand backup nor anything! I didn't modded it myself so I don't know what's in it!

When I boot it, I get the black screen! I tried the savemii frii with the gc controller and still nothing! I've tried it on a different wii and it works, so my timing and everything is good! I also tried the reset button when booting... nothing!

I've read that older firmware ( not sure which one) doesn't show up the firmware numbers at the bottom right of the screen! is this possible?